Hydraulic rotary piston motor system



July 27, 1965 F. SNEEN 3,196, 4

mmmumc ROTARY PISTON MOTOR SYSTEM Filed July 28. 1961 2 Sheets-Sheet i July 27, 1965 F. SNEEN I 3,196,934

HYDRAULIC ROTARY PISTON MOTOR SYSTEM Filed July 28. 1961 2 Sheets-Sheet 2 United States Patent HYDRAULIC RQTARY PISTON MOTOR SYSTEM Franz Sneen, Skanninge, Sweden, assignor to Konstruktioner & Experiment A.B., Skanninge, Sweden Filed July 28, 1961, Ser. No. 127,736 Claims priority, application Sweden, Aug. 3, 1960, 7,473/ 60 3 Claims. (Cl. 160-229) It is known that in hydraulic rotary piston servomotors the load on the motor shaft and its bearing is reduced by providing the shaft and the surrounding housing with wings or blades diametrically opposite to one another in pairs, so that the forces, often very powerfulthat opearte the wings, balance each other. This measure, in itself very favourable, gives rise to the difiiculty that the servo-motor cannot achieve a larger torsion angle than about 100, of the elements operated by the servomotor that are rotatable in relation to one another.

Sometimes, however, for instance, when the servomotor is used for pivoting hatch covers from closed to open position in a ship, a larger torsion angle is required which, in the case referred to, may amount to 180.

The present invention refers to a device which makes this possible.

The device according to the invention is characterised by at least two oscillating vane motors installed on the same shaft, two of the elements in the system being mounted fast each on its rotary element and made to cooperate in rotating the latter, while the other elements are rotatable in relation to the elements that are mounted fast in this way.

The invenion is made clear by the accompanying drawings, in which:

FIGURE 1 shows a type in which two oscillating vane servo-motors are installed next to each other on the same freely rotatable shaft, and each is made to rotate its rotatable part through an angle of 90 the rotation being in opposite directions;

FIGURES 2 and 3 show cross sections along the line II-II in FIGURE 1, with the hatches respectively folded and unfolded;

FIGURES 4 and 5 show similar cross sections along the line IVIV in FIGURE 1;

FIGURES 6, 7 and 8 show how the device illustrated in FIGURES 1 to 5 is installed and works a folding hatch in a ship; and

FIGURE 9 shows another type, in which two oscillating vane servo-motors are installed, one concentrically above the other.

Type I (FIGURES 1 to 5) which constitute a part of the hatch cover include an oscillating vane motor operably connected between adjacent pairs of panels 6, 8. One of the panels 8 is hingedly connected to the combing 13 as indicated at 15 and wheels 3,196,934 Patented July 27, 1965 ice 11 are provided for the panels with the wheels riding on track 16 associated with the combing.

Referring more particularly to FIGURES 1-5, it will be noted that panels 6, 8 include top walls 6, 7, bottom walls 6", 7" and end walls 7, 9 respectively. Each end wall 7, 9 extends from the bottom wall to the top wall at an angle of 45 as is clearly apparent in FIGURE 3.

To impart the necessary pivotal movement to the panels, there is provided two oscillating vane motors 1 and 2 arranged in axial relationship with the motors being installed on a common shaft 3. A bearing 4 is suitably secured as indicated at 4' to the end wall 7 of the panel 6 and a bearing 5 is secured as at 5 to the end wall 9 of the panel 8. The ends of the shaft 3 are rotatably supported in the bearings 4, 5 and manifestly these bearings are disposed at an angle of 45 relative to the top Walls of the panels 6, 8.

The motors 1 and 2 each include a housing 1', 2 respectively and housing 1' is secured as shown at 1" to the end wall 9 of the panel 8. The housing 2' is secured as shown at 2" to the end wall 7 of the panel 6.

It is believed apparent that the motors 1, 2 upon operation of such motors can rotate the panels 6, 8 through angles in relationship to the shaft 3 but in opposite directions whereby the angle between the panels 6, 8 can be changed by 180 as clearly illustrated in FIGURES 2 and 3.

Type II (FIGURE 9) In this type, two motor housings 17 and 18 are installed, one concentrically around the other. The inner housing 17 is provided externally and internally with wings or blades 19 and 20 respectively, so that it serves as a shaft for the outer housing 18. The innermost shaft 21 must be non-rotatably fitted to one of the two relatively rotatable parts, whereas the intermediate housing 17 is rotatably mounted both on the outer housing 18 and on the innermost shaft 21.

In this type more than two housings can, of course be installed in front of one another, in which situation the total torsion angle is increased by about for every additional housing.

The invention is not to be confined to the embodiments specifically illustrated but changes or modifications may be made therein so long as such changes or modifications mark no material departure from the spirit and scope of the appended claims.

I claim:

1. The combination of two pivotally connected elements, two hydraulic oscillating vane motors, each having a housing, said housings being mounted one on each element, the housings being coaxial and operably connected to said motors and adapted to be acted upon in opposite directions by said motors, and means for supporting each end of the shaft on a respective one of the elements, the shaft being freely rotatable in the supporting means.

2. In an assemblage of the character described, a pair of elements having adjacent end edges when the elements are arranged in the same plane, a shaft extending transversely of the end edges, two coaxially arranged hydraulic oscillating vane motors operably connected to said shaft bearing means on one of the elements, bearing means on the other of the elements, said bearing means being positioned at opposite ends of said motors with said shaft being freely rotatable in said bearing means, means mounting one of the motors on one of the elements and means mounting the other motor on the other element whereby upon operation of the motors the elements are angularly moved relative to each other in opposite directions.

3. The apparatus as claimed in claim 2 in which each of said adjacent end edges extends at an angle of 45 with respect to said shaft whereby said elements may be rotated through an angle of 180 with respect to each other.

References Cited by the Examiner UNITED STATES PATENTS 4 2,855,038 10/58 Greer 160188 2,911,956 11/59 Smith 12198 2,930,434 3/60 Englesson 160-188 OTHER REFERENCES Gotaverken publication, pages 4 and 5, May 11, 1961.

HARRISON R. MOSELEY, Primary Examiner.

CHARLES E. OCONNELL, RALPH H. BRAUNER, 0 Examiners. 

1. THE COMBINATION OF TWO PIVOTALLY CONNECTED ELEMENTS, TWO HYDRAULIC OSCILLATING VANE MOTORS, EACH HAVING A HOUSING, SAID HOUSINGS BEING MOUNTED ONE ON EACH ELEMENT, THE HOUSINGS BEING COAXIAL AND OPERABLY CONNECTED TO SAID MOTORS AND ADAPTED TO BE ACTED UPON IN OPPOSITE DIRECTIONS BY SAID MOTORS, AND MEANS FOR SUPPORTING EACH 